Adding navbar buttons to react-native-navigation while using react-native-meteor

I'm using react-native-navigation in combination with react-native-meteor. Since Meteor 1.3 it's recommended to use createContainer method when using React. However, if I remove 'export default' from class definition and move it to export default createContainer(params=>{...}, MyClass), I loose definition of nav bar buttons. How I should write it to not loose definition of my nav bar buttons? Thanks :)